LUKS encrypted drive will not lock under any circumstance

I have a LUKS encrypted drive. For months, the drive behaved normally, locking itself on every system restart, logout, or dismount. Now, no matter what I do, it does not lock anymore. How can I get it to lock again?

Should usually happen through dbus. There was recently a change where dbus-broker and dbus-daemon-units are set in conflict. Switch to one of them back/forth, maybe it helps.

You can lock the block device with:

 udisksctl lock --block-device /dev/sdXY
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